Same here. I even brought it to my dealer thinking something was wrong. Dealer said nothing was wrong, no error codes in the transmition. He did feel it during test drive though. Then it went away everything was smooth again. Sometimes it does it again but most of the time it's smooth. At first I thought it was because of my K&N filter but it did it also when I put the stock filter back. Doesn't bother me as long as it doesn't damage anything in the car.